The invention relates to a fluorine-containing resin (graft copolymer) used for preparing a paint. This resin is prepared by a graft copolymerization of a fluorine-containing copolymer with a first monomer composition. The fluorine-containing copolymer comprises a first constitutional unit derived from a fluoroolefin and at least one of second and third constitutional units. The second constitutional unit is derived from a particular carboxylic acid vinyl ester represented by a general formula of R-C(=O)OCH=CH2 where R is a special group. The third constitutional unit is derived from a first monomer which is at least one compound selected from vinyl ethers and allyl ethers. The first monomer is represented by a general formula of R-O-(CH2)n-CH=CH2. The first monomer composition for preparing the resin contains a second monomer which is at least one compound selected from methacrylic acid eaters and acrylic esters. The second monomer is represented by a general formula of CH2=C(-R')C(=O)O-R where R' is hydrogen atom or methyl group. A composition prepared by mixing the resin with vinylidene fluoride resin or with a combination of vinylidene fluoride resin and acrylic resin is capable of providing a coated film having high gloss, high weather resistance, and good results in bending test for a long time. Another composition prepared by mixing the resin with a hardener is capable of providing a coated film having high hardness, good adhesion to various other coated films, high weather resistance, and high stain resistance.
本发明涉及一种用于制备涂料的含
氟树脂(接枝共聚物)。这种
树脂是通过含
氟共聚物与第一单体组合物的接枝共聚来制备的。含
氟共聚物包括源自
氟烯烃的第一构型单元以及第二和第三构型单元中的至少一个。第二结构单元来源于一种特殊的
羧酸乙烯基酯,其通式为 R-C(=O)OCH=
CH2,其中 R 为特殊基团。第三种结构单元来自第一种单体,该单体是至少一种选自
乙烯基醚和
烯丙基醚的化合物。第一单体的通式为 R-O-( )n-CH= 。制备
树脂的第一单体组合物含有第二单体,第二单体是至少一种选自
甲基丙烯酸酯和
丙烯酸酯的化合物。第二单体的通式为 =C(-R')C(=O)O-R,其中 R'为氢原子或甲基。将该
树脂与
偏氟乙烯树脂或与
偏氟乙烯树脂和
丙烯酸树脂的组合物混合制备的组合物能够提供具有高光泽、高耐候性和长期弯曲测试结果良好的涂膜。另一种通过将
树脂与固化剂混合制备的组合物能够提供具有高硬度、与其他各种涂膜具有良好粘合性、高耐候性和高抗污性的涂膜。